ip_proxy.h

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    1 /*
    2  * Copyright (C) 1997 by Darren Reed.
    3  *
    4  * Redistribution and use in source and binary forms are permitted
    5  * provided that this notice is preserved and due credit is given
    6  * to the original author and the contributors.
    7  *
    8  * $FreeBSD$
    9  */
   10 
   11 #ifndef __IP_PROXY_H__
   12 #define __IP_PROXY_H__
   13 
   14 #ifndef SOLARIS
   15 #define SOLARIS (defined(sun) && (defined(__svr4__) || defined(__SVR4)))
   16 #endif
   17 
   18 #ifndef APR_LABELLEN
   19 #define APR_LABELLEN    16
   20 #endif
   21 #define AP_SESS_SIZE    53
   22 
   23 struct  nat;
   24 struct  ipnat;
   25 
   26 typedef struct  ap_tcp {
   27         u_short apt_sport;      /* source port */
   28         u_short apt_dport;      /* destination port */
   29         short   apt_sel;        /* seqoff/after set selector */
   30         short   apt_seqoff[2];  /* sequence # difference */
   31         tcp_seq apt_after[2];   /* don't change seq-off until after this */
   32         u_char  apt_state[2];   /* connection state */
   33 } ap_tcp_t;
   34 
   35 typedef struct  ap_udp {
   36         u_short apu_sport;      /* source port */
   37         u_short apu_dport;      /* destination port */
   38 } ap_udp_t;
   39 
   40 typedef struct ap_session {
   41         struct  aproxy  *aps_apr;
   42         struct  in_addr aps_src;        /* source IP# */
   43         struct  in_addr aps_dst;        /* destination IP# */
   44         u_char  aps_p;          /* protocol */
   45         union {
   46                 struct  ap_tcp  apu_tcp;
   47                 struct  ap_udp  apu_udp;
   48         } aps_un;
   49         u_int   aps_flags;
   50         QUAD_T  aps_bytes;      /* bytes sent */
   51         QUAD_T  aps_pkts;       /* packets sent */
   52         u_long  aps_tout;       /* time left before expiring */
   53         void    *aps_data;      /* private data */
   54         int     aps_psiz;       /* size of private data */
   55         struct  ap_session      *aps_next;
   56 } ap_session_t ;
   57 
   58 #define aps_sport       aps_un.apu_tcp.apt_sport
   59 #define aps_dport       aps_un.apu_tcp.apt_dport
   60 #define aps_sel         aps_un.apu_tcp.apt_sel
   61 #define aps_seqoff      aps_un.apu_tcp.apt_seqoff
   62 #define aps_after       aps_un.apu_tcp.apt_after
   63 #define aps_state       aps_un.apu_tcp.apt_state
   64 
   65 
   66 typedef struct  aproxy  {
   67         char    apr_label[APR_LABELLEN];        /* Proxy label # */
   68         u_char  apr_p;          /* protocol */
   69         int     apr_ref;        /* +1 per rule referencing it */
   70         int     apr_flags;
   71         int     (* apr_init) __P((fr_info_t *, ip_t *, tcphdr_t *,
   72                                    ap_session_t *, struct nat *));
   73         int     (* apr_inpkt) __P((fr_info_t *, ip_t *, tcphdr_t *,
   74                                    ap_session_t *, struct nat *));
   75         int     (* apr_outpkt) __P((fr_info_t *, ip_t *, tcphdr_t *,
   76                                     ap_session_t *, struct nat *));
   77 } aproxy_t;
   78 
   79 #define APR_DELETE      1
   80 
   81 
   82 extern  ap_session_t    *ap_sess_tab[AP_SESS_SIZE];
   83 extern  aproxy_t        ap_proxies[];
   84 
   85 extern  int     ap_ok __P((ip_t *, tcphdr_t *, struct ipnat *));
   86 extern  void    ap_unload __P((void));
   87 extern  void    ap_free __P((aproxy_t *));
   88 extern  void    aps_free __P((ap_session_t *));
   89 extern  int     ap_check __P((ip_t *, tcphdr_t *, fr_info_t *, struct nat *));
   90 extern  aproxy_t        *ap_match __P((u_char, char *));
   91 extern  void    ap_expire __P((void));
   92 
   93 #endif /* __IP_PROXY_H__ */

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FreeBSD/Linux Kernel Cross Reference sys/netinet/ip_proxy.h

FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_proxy.h